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Monochoria vaginalis

Higher Taxonomy
Family: PontederiaceaeView DescriptionDichotomous Key

Habit: Annual, perennial herb, submersed, emergent, floating, or on wet ground. Leaf: simple, alternate or whorled, +- in basal rosette or not; blade linear (especially underwater) to round, sometimes sagittate or cordate, base generally sheathing, veins parallel; petiole inflated or not. Inflorescence: raceme, spike, panicle, or 1-flowered, terminal but often appearing +- axillary, subtended by sheathing bract. Flower: bisexual, radial or +- bilateral; perianth lobes 6 (in 2 series) [3,4], petal-like; stamens 3, 6 (in 2 series) [1,4], from various levels on perianth tube, equal or not, sometimes 3 sterile, modified; ovary superior, 1 or 3-chambered. Fruit: many-seeded, loculicidal capsule [1-seeded utricle]. Seed: < 1 cm, longitudinally ribbed [or not].
Genera In Family: +- 6 genera, 30 species: most pantropical, some temperate. Note: Some cultivated as orns, some weeds, especially in rice fields. Pontederia cordata L. establishes from garden waste.
eFlora Treatment Author: Charles N. Horn & Elizabeth McClintock
Scientific Editor: Thomas J. Rosatti.
Genus: MonochoriaView Description 

Habit: Annual [perennial herb], generally emergent. Stem: +- erect, stout [elongate]. Leaf: in basal rosettes; blade ovate to narrowly lanceolate; petiole not inflated, generally > blade. Inflorescence: raceme, reflexed after flower. Flower: +- radial; perianth bell-shaped to rotate, tube < 1 cm, parts 6, nearly free; stamens 6, 1 generally > others; ovary 3-chambered.
Species In Genus: 6 species: tropical Africa, Asia, northeastern Australia. Etymology: (Greek: 1 apart, from 1 stamen > others)

Monochoria vaginalis (Burm. f.) Kunth
Stem: > 12 cm. Leaf: blade 2.5--11 cm; petiole 4--70 cm. Inflorescence: > 5 cm, few-flowered. Flower: generally opening under water; perianth blue, parts < 2 cm.
Ecology: Uncommon. Rice fields; Elevation: > 100 m. Bioregional Distribution: ScV; Distribution Outside California: native to tropical Australia, Asia. Flowering Time: Sep
eFlora Treatment Author: Charles N. Horn & Elizabeth McClintock
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Citation for this treatment: Charles N. Horn & Elizabeth McClintock 2016. Monochoria vaginalis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 30, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 30, 2016.

Geographic subdivisions for Monochoria vaginalis:
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.